I did this because I replaced my A/C hose assembly and it was leaking. The A/C Compressor is under the exhaust manifold, above the frame and between the radiator and the engine. It's not easy to get to, I could even see it when I put it on I did it by feel. So I wasn't sure if I got the hose assembly on the compressor good.

So, I took removed the radiator and A/C condenser:

http://farm6.static.flickr.com/5267/5654000152_7d54eebd4c_b.jpg

The radiator looked new, because it was behind the condenser, which was filthy:

http://farm6.static.flickr.com/5268/5653428103_94cb92025f_b.jpg

Cleaned:

http://farm6.static.flickr.com/5026/5654001396_21c9eb2a8d_b.jpg

A close up of the area in question; the A/C compressor, hose assembly, and the real culprit, the sensor on the hose assembly. It was loose:

http://farm6.static.flickr.com/5222/5654000402_988f6b4b5a_b.jpg

Engine degreaser, sensors and connections cleaned with zero residue electronics cleaner, taped back the pigtails for the compressor and sensor and installed a new lower radiator hose. New o-ring on the a/c line sensor port.

I also stuffed some clean shop towels into the a/c hoses to keep from getting dirt in them.

The lines you see here on the bottom left are the transmission cooler lines. (There is also an auxillary transmission cooler and an oil cooler on the other side of the radiator.)

http://farm6.static.flickr.com/5024/5653430021_869d7e888c_b.jpg

The other side; new upper radiator hose, plugged a/c lines, oil cooler lines... you can see my box of new, green a/c system o-rings on the bottom right. Replaced as needed: